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54 lines
1.6 KiB
Bash
54 lines
1.6 KiB
Bash
# $OpenBSD: hostkey-agent.sh,v 1.11 2019/12/16 02:39:05 djm Exp $
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# Placed in the Public Domain.
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tid="hostkey agent"
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rm -f $OBJ/agent-key.* $OBJ/ssh_proxy.orig $OBJ/known_hosts.orig
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trace "start agent"
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eval `${SSHAGENT} ${EXTRA_AGENT_ARGS} -s` > /dev/null
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r=$?
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[ $r -ne 0 ] && fatal "could not start ssh-agent: exit code $r"
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grep -vi 'hostkey' $OBJ/sshd_proxy > $OBJ/sshd_proxy.orig
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echo "HostKeyAgent $SSH_AUTH_SOCK" >> $OBJ/sshd_proxy.orig
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trace "load hostkeys"
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for k in $SSH_KEYTYPES ; do
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${SSHKEYGEN} -qt $k -f $OBJ/agent-key.$k -N '' || fatal "ssh-keygen $k"
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(
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printf 'localhost-with-alias,127.0.0.1,::1 '
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cat $OBJ/agent-key.$k.pub
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) >> $OBJ/known_hosts.orig
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${SSHADD} $OBJ/agent-key.$k >/dev/null 2>&1 || \
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fatal "couldn't load key $OBJ/agent-key.$k"
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echo "Hostkey $OBJ/agent-key.${k}" >> $OBJ/sshd_proxy.orig
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# Remove private key so the server can't use it.
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rm $OBJ/agent-key.$k || fatal "couldn't rm $OBJ/agent-key.$k"
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done
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cp $OBJ/known_hosts.orig $OBJ/known_hosts
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unset SSH_AUTH_SOCK
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for ps in yes; do
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for k in $SSH_KEYTYPES ; do
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verbose "key type $k privsep=$ps"
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cp $OBJ/sshd_proxy.orig $OBJ/sshd_proxy
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echo "UsePrivilegeSeparation $ps" >> $OBJ/sshd_proxy
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echo "HostKeyAlgorithms $k" >> $OBJ/sshd_proxy
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opts="-oHostKeyAlgorithms=$k -F $OBJ/ssh_proxy"
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cp $OBJ/known_hosts.orig $OBJ/known_hosts
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SSH_CONNECTION=`${SSH} $opts host 'echo $SSH_CONNECTION'`
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if [ $? -ne 0 ]; then
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fail "privsep=$ps failed"
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fi
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if [ "$SSH_CONNECTION" != "UNKNOWN 65535 UNKNOWN 65535" ]; then
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fail "bad SSH_CONNECTION key type $k privsep=$ps"
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fi
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done
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done
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trace "kill agent"
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${SSHAGENT} -k > /dev/null
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